20017480

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{1459}}^1$

素因数の和:1491

約数の個数: 64

約数和(自身を含む): 52560000

約数和(自身を除く): 32542520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1459, 1715, 1960, 2744, 2918, 3430, 5836, 6860, 7295, 10213, 11672, 13720, 14590, 20426, 29180, 40852, 51065, 58360, 71491, 81704, 102130, 142982, 204260, 285964, 357455, 408520, 500437, 571928, 714910, 1000874, 1429820, 2001748, 2502185, 2859640, 4003496, 5004370, 10008740, 20017480]

約数ペア:

[(1, 20017480), (2, 10008740), (4, 5004370), (5, 4003496), (7, 2859640), (8, 2502185), (10, 2001748), (14, 1429820), (20, 1000874), (28, 714910), (35, 571928), (40, 500437), (49, 408520), (56, 357455), (70, 285964), (98, 204260), (140, 142982), (196, 102130), (245, 81704), (280, 71491), (343, 58360), (392, 51065), (490, 40852), (686, 29180), (980, 20426), (1372, 14590), (1459, 13720), (1715, 11672), (1960, 10213), (2744, 7295), (2918, 6860), (3430, 5836)]